Configure unified-secops-platform to allow public contributions

Author: garycentric

.openpublishing.publish.config.json

@@ -143,7 +143,7 @@
       "build_output_subfolder": "unified-secops-platform",
       "locale": "en-us",
       "monikers": [],
-      "open_to_public_contributors": false,
+      "open_to_public_contributors": true,
       "type_mapping": {
         "Conceptual": "Content"
       },